Access local owncloud installation with a domain name

I have owncloud installed on a local server at the office located at a buisness incubator and a web site with a domain name on a remote server.

Current installation:

  • Domain: that points to my remote server
  • owncloud installation with local static ip
  • incubator’s ip/port 123.123.456.789:1234 forwarded to owncloud’s local ip/port

I can access owncloud installation using incubarot’s ip/port 123.123.456.789:1234 and a local ip

My goal is to be able to access owncloud using a sub domain

Is this configuration possible?